Enhanced performance and bearing durability is achieved through precise heat treating of load-bearing surfaces throughout the unit. Internal bearings are manufactured to provide smooth, Quiet and trouble-free performance for the life of the part. Abs sensors are tested to OE specifications to ensure proper ABS signal and emergency braking performance when you need it. Only Premium steel is used in the manufacture of our hub assemblies. This ensures durability and a long service life. All hub assemblies are factory sealed using the latest seal design technology and grease to combat bearing contamination and heat fatigue.